CN118397739A - A smart access control system - Google Patents

Abstract

The application discloses an intelligent access control system, which relates to the technical field of access control and particularly comprises an identity verification module, an access control module and a remote communication module, wherein the intelligent access control system realizes the control functions of automatic identification of user identity and remote access control through a cloud platform connection and a TCP transmission technology, and a user is connected to a server control applet through a wireless WIFI module to monitor the state and activity of the access control system in real time at any time and any place. The system has the characteristics of high safety, intelligence, networking and override. The safety and convenience of the access control system are improved, the energy efficiency is optimized, the remote monitoring capability is enhanced, the system is more intelligent and user-friendly, and meanwhile potential safety hazards caused by human factors are reduced.

Description

A smart access control system

Technical Field

The present invention relates to the technical field of access control, and in particular to a smart access control system.

Background technique

In the existing access control system technology field, a variety of access control management solutions are widely used in residential areas, office buildings, schools and other places to ensure the security of the area and the convenience of management. Access control usually relies on traditional physical media such as keys, magnetic cards or more advanced technologies such as password input, fingerprint recognition and RFID technology for identity authentication. In addition, some access control systems have also introduced video surveillance technology to enhance security measures. The above access control methods have their own advantages, but they are mainly concentrated on a single identity authentication method or a combination of multiple methods, and less consideration is given to the overall intelligent and networked management of the system.

Traditional access control systems have the following problems, including limited security, insufficient convenience, lack of data management and tracking functions, insufficient integration capabilities, lack of remote access and control capabilities, and low usability and efficiency. For example, mechanical key locks are easy to be pried and copied. Once the key is lost or stolen, the security of the door is threatened. The use of physical keys may cause inconvenience and easy loss, especially when multiple people need to share access rights. Traditional door locks are also unable to provide data management and tracking of people entering and leaving, limiting the ability to monitor personnel activities. At the same time, traditional systems are usually unable to integrate with other security systems such as video surveillance and intrusion alarm systems, reducing overall security and monitoring effects. Traditional access control systems cannot be operated remotely, and have a long response time for user authentication and information processing, reducing their efficiency and practicality.

Summary of the invention

The present application provides a smart access control system, the main purpose of which is to solve the problems raised in the background technology.

To achieve the above-mentioned purpose, the present application provides a smart access control system, including an identity authentication module, an access control module and a remote communication module. The smart access control system realizes the control functions of automatic identification of user identity and remote monitoring of access control through cloud platform connection and TCP transparent transmission technology. Users connect to the server control applet through a wireless WIFI module to monitor the status and activities of the access control system in real time anytime and anywhere.

In a feasible implementation, the identity authentication module supports multiple authentication methods, including password keys, NFC cards, and camera modules, to improve the security of the access control system and ensure that only authorized users can successfully unlock the door.

In a feasible implementation, the camera module adopts OpenMV, which is an open source computer vision platform based on MicroPython and is used for embedded systems and Internet of Things applications. It integrates an image sensor, a processor, and an environment for running MicroPython. The OpenMV module is used to obtain image data of the access control area in the access control system;

In a feasible implementation manner, the password buttons are four buttons, including three buttons for inputting passwords and one confirmation button. In the access control system, when the confirmation password button is triggered, the system will read the combination password input by the user.

In a feasible implementation, the access control module performs door opening and closing operations through the MM32F5 microcontroller, and uses OpenMV to support face recognition algorithms in conjunction with calling database recognition methods to enhance the security of the access control system.

In a feasible implementation, the remote communication module uses IoT technology to support remote management of the access control system through the Internet, including remote door opening, viewing access control logs and real-time monitoring of access control status. When the wireless WIFI module turns on the transparent transmission mode, it is no longer restricted to specific AT commands and can transmit multiple data. By connecting the smart access control system to the cloud platform, the smart access control system can synchronize the access control data to the mini program in real time, allowing users to monitor the access control status and record the access control usage anytime and anywhere.

In a feasible implementation, the access control module includes an MM32F5 microcontroller, whose functions include processing sensor data and controlling the access control device to communicate with the esp32 module, receiving instructions from the cloud platform, judging the legitimacy of the unlocking request and sending the unlocking instruction to the access control device.

In a feasible implementation, the mini program interacts with the cloud server to exchange data and supports users to remotely access and control the access control system. Users can access the real-time monitoring data, door opening records, and alarm information of the access control system through the mini program. Users can also remotely control the access control system's switches, password settings, and view suspicious person alarm functions through the mini program.

In a feasible implementation, the mini-program is configured with a user interface module, realizes user interaction through a touch screen or a mobile application, and supports the mini-program to perform system settings or manually control access control.

In a feasible implementation, the server has an abnormal alarm function, notifying the administrator via email or text message in the event of illegal intrusion or system failure, and updating data in real time through a small program for rapid response.

The application provides a smart access control system that integrates a camera module, is processed by a microcontroller, and supports efficient face recognition unlocking. This system innovatively applies Internet of Things technology to remote monitoring and control, and achieves efficient and convenient data transmission through the integration of cloud platforms and mini-programs. Users can remotely unlock and monitor access control through WeChat mini-programs, and administrators can also view door opening records in real time and receive alarm pictures. At the same time, since the entire system is based on the MM32F527 development board as the core control part, it has strong scalability.

This system is highly secure, intelligent, networkable, and controllable. It can provide intelligent, safe, and reliable access control solutions for various corporate office buildings, residential areas, schools, and other scenarios, and is suitable for a variety of practical application scenarios. It improves the security and convenience of the access control system, optimizes energy efficiency, and enhances remote monitoring capabilities, making the system more intelligent and user-friendly, while reducing safety hazards caused by human factors and improving the efficiency and effectiveness of access control management.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram showing a system functional structure of a smart access control system provided in an embodiment of the present application;

FIG2 shows a system functional block diagram of a smart access control system provided in an embodiment of the present application;

FIG3 shows a schematic diagram of a cloud application technology overview of a smart access control system provided by an embodiment of the present application;

Figure 4 shows a schematic diagram of the main user interface of the WeChat applet of a smart access control system provided in an embodiment of the present application.

Detailed ways

In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

Referring to Figures 1 to 4, an embodiment of the present application provides a smart access control system, including an identity authentication module, an access control module and a remote communication module. The smart access control system realizes the control functions of automatic identification of user identities and remote monitoring of access control through cloud platform connection and TCP transparent transmission technology. Users connect to the server control applet through a wireless WIFI module to monitor the status and activities of the access control system in real time anytime and anywhere.

The TCP protocol is the basis of the transmission layer of the intelligent access control system and the core protocol for Internet data transmission. It has reliability and stability. TCP is responsible for data subpackaging, transmission, and retransmission during the transmission process to ensure the integrity and accuracy of the data. After the WIFI module turns on the transparent transmission mode, it is no longer restricted to specific AT commands and can quickly and accurately transmit large amounts of data, avoiding the inconvenience caused by different data types or formats. The wireless WIFI module is the ESP32 wireless WIFI module.

Smart access control systems often use WIFI technology for data transmission. WIFI technology provides high-speed and stable wireless data transmission capabilities. It is suitable for scenarios with high requirements for real-time data and provides technical support for real-time display of images and time data. Through the WIFI module, the access control device can establish a network connection with the cloud platform or other management terminals, and realize rapid data upload and transmission.

Cloud servers and WeChat mini programs use HTTP protocol for data transmission, which is an application layer protocol widely used in Internet communications. HTTP protocol is a stateless protocol based on request and response mode. It uses URL as the identifier to locate network resources and indicates the operation of resources through request methods (such as GET, POST, etc.). When WeChat mini programs communicate with cloud servers, and when the WIFI module communicates with the server, the JSON format is used to transmit data.

In some examples, the authentication module further supports multiple authentication methods, including password buttons, NFC cards, and camera modules, which improves the security of the access control system and ensures that only authorized users can unlock the door. The camera module captures surveillance images, encodes the grayscale value of the image, and transmits the image data to the cloud through the WIFI module. The image decoding operation is performed in the background and the image is saved in the cloud platform and database. At the same time, the image is uploaded to the WeChat applet for display. Users can judge whether it is a suspicious person through the image and provide evidence records, which enhances security. The camera receives instructions from the main control chip through the wireless serial port and stores the captured image to the local storage device and the external SD card. The images that are usually saved can be in standard image formats, such as JPEG, PNG, etc., so that they can be viewed and processed in other devices or software.

In some examples, the camera module uses OpenMV, which is an open source computer vision platform based on MicroPython, specially designed for embedded systems and IoT applications, integrating image sensors, processors and an environment for running MicroPython. Through the OpenMV module, the access control system can obtain image data of the access control area;

The OpenMV module has the following functions:

Image processing: The OpenMV module has a built-in image processing library that can perform common image processing operations, such as image filtering, edge detection, binarization, etc. This can process images in the access control area, extract useful information, and provide support for subsequent face recognition and human body sensing functions.

Face recognition: The OpenMV module supports face recognition algorithms and provides corresponding APIs and libraries. By collecting image data from the access control area, faces can be recognized and verified to determine whether the user's identity is legal. This can enhance the security of the access control system, and only authenticated users can unlock the door.

Human body sensing: The OpenMV module integrates infrared sensors and image sensors, which can perform human body sensing functions. By detecting whether there is a person in the access control area, the corresponding operation of the access control system can be triggered, such as automatic door opening or alarm. At the same time, when there is no one outside the door, the system can enter a dormant state to reduce energy consumption.

Therefore, as part of the perception layer, the OpenMV module has functions such as image processing, face recognition and human body sensing in the access control system, providing the system with perception capabilities to support the normal operation and security enhancement of the access control system.

There are four password buttons. Users can enter the password by pressing the three buttons E0, E1, and E2. In the access control system, when the confirmation password button (E3) is triggered, the system will read the password entered by the user. Through the use of password buttons, the access control system can provide a traditional identity authentication method to supplement the functions of image processing and face recognition. Users can choose to use password buttons to open the door to increase the flexibility and security of the access control system.

NFC card is a wireless communication technology that can communicate with the access control system at close range; NFC card can be used as a convenient and fast way to authenticate identity. Users can quickly authenticate by simply holding the NFC card close to the reader, without having to manually enter a password. In addition, users can save NFC cards on their mobile phones and use the NFC function of the mobile phone to swipe the card to open the door.

By combining the OpenMV module, password button and NFC card, the access control system can provide multiple authentication methods, increasing flexibility and security. Users can choose the appropriate authentication method to open the access control system according to their needs and preferences.

In some examples, further, the access control module performs door opening and closing operations through a microcontroller, and uses OpenMV to support face recognition algorithms, and provides corresponding APIs and libraries to enhance the security of the access control system;

The main control chip used in the microcontroller is the MM32F5270 microcontroller platform of Shanghai Lingdong Microelectronics. The MM32F5270 is an MCU product of Shanghai Lingdong Microelectronics equipped with the ArmChina STAR-MC1 core of Arm Technology. Its operating frequency can reach 120MHz, with built-in 256KBFlash and 192KBRAM. The camera can record face data into the SD card through image acquisition and processing technology. The camera first needs to use the face detection algorithm to find the face position in the image. For face recognition, the camera will extract the key features of the face, such as facial Contours, eyes, mouths, etc. These features are usually converted into vector form and used for subsequent comparison. Once the camera collects face data and extracts the corresponding features, it can store these data in the form of images or vectors in the SD card. Generally, the face image and related identification information (such as ID, timestamp, etc.) are saved in a specific file on the SD card. Once the camera detects a face, the LBP feature extraction algorithm can be used to extract features of the face. The LBP feature converts the face area into a binary pattern, describes the texture information of different areas, and forms a unique feature vector. And compare it with the known face features that have been pre-entered and stored. Finally, based on the comparison results, the system can draw a conclusion on the recognition: whether it is a known face, and which known face it is.

In some examples, further, the remote communication module adopts IoT technology to support remote management of the access control system through the Internet, including remote door opening, viewing access control logs and real-time monitoring of access control status. After the wireless WIFI module turns on the transparent transmission mode, it is no longer restricted to specific AT commands, and can transmit large amounts of data quickly and accurately, avoiding the inconvenience caused by different data types or formats, and realizing real-time data updates. By connecting to the cloud platform, the smart access control system can synchronize access control data to the WeChat applet in real time, allowing users to monitor the access control status and record access control usage anytime and anywhere.

In some examples, the remote communication module can further implement real-time data updates. By connecting to the cloud platform, the access control data can be synchronized to the WeChat applet in real time, allowing users to monitor the access control status anytime and anywhere. Users can remotely control the access control system's switch, face entry, face recognition, view door opening time and alarm time, suspicious person alarm and other functions through the applet, achieving more convenient management and control. Through the applet super control, users can understand the status of the access control system at any time, control and manage the access control system in real time, and improve the security and convenience of the access control system.

In some examples, further, the control core of the access control module is a microcontroller, whose functions include processing sensor data and controlling the access control device to communicate with the ESP32 module, receiving instructions from the cloud platform, and determining the legitimacy of the unlocking request, and finally sending the unlocking instruction to the access control device.

In some examples, the WeChat applet interacts with the cloud server to support remote access and control of the access control system. Users can obtain real-time monitoring data, door opening records, alarm information, etc. of the access control system through the WeChat applet. At the same time, the applet can remotely control the switch of the access control system, set passwords, and view suspicious person alarm functions.

WeChat applet configures the user interface module, realizes user interaction through touch screen or mobile application, and supports WeChat applet for system settings or manual access control.

In some examples, further, the cloud server has an abnormal alarm function. When the system detects an abnormal situation or unauthorized entry, the control terminal device sends a voice prompt through a speaker or horn to remind potential intruders to leave. In the event of illegal intrusion or system failure, the administrator is notified by email or text message. The data is updated in real time through the WeChat applet, and the response is fast. The camera captures the corridor image in real time and identifies whether someone passes through the corridor. If someone is identified in the corridor area, the image is processed to obtain the pedestrian location information, and the PID algorithm is used to calculate the pan-tilt angle, thereby controlling the pan-tilt to automatically follow the pedestrian for shooting quickly and stably.

The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims (10)

1. A smart access control system, characterized in that it includes an identity authentication module, an access control module and a remote communication module. The smart access control system realizes the control functions of automatic identification of user identities and remote monitoring of access control through cloud platform connection and TCP transparent transmission technology. Users connect to the server control applet through a wireless WIFI module to monitor the status and activities of the access control system in real time anytime and anywhere. 2. According to claim 1, the intelligent access control system is characterized by: The identity verification module supports multiple authentication methods, including password keys, NFC cards, and camera modules, which improves the security of the access control system and ensures that only authorized users can successfully unlock the door. 3. The intelligent access control system according to claim 2, characterized in that: The camera module adopts OpenMV, which is an open source computer vision platform based on MicroPython and is used for embedded systems and Internet of Things applications. It integrates an image sensor, a processor and an environment for running MicroPython. The OpenMV module is used to obtain image data of the access control area in the access control system. 4. The intelligent access control system according to claim 3, characterized in that: The password buttons are four buttons, including three buttons for inputting passwords and one confirmation button. In the access control system, when the confirmation password button is triggered, the system will read the combination password input by the user. 5. The intelligent access control system according to claim 4, characterized in that: The access control module uses the MM32F5 microcontroller to perform door opening and closing operations. It also uses OpenMV to support face recognition algorithms and call database recognition methods to enhance the security of the access control system. 6. The intelligent access control system according to claim 1, characterized in that: The remote communication module uses IoT technology to support remote management of the access control system through the Internet, including remote door opening, viewing access control logs and real-time monitoring of access control status. When the wireless WIFI module turns on the transparent transmission mode, it is no longer restricted to specific AT commands and can transmit multiple data. By connecting the smart access control system to the cloud platform, the smart access control system can synchronize access control data to the mini program in real time, allowing users to monitor the access control status and record access control usage anytime and anywhere. 7. The intelligent access control system according to claim 1, characterized in that: The access control module includes an MM32F5 microcontroller, and its functions include processing sensor data and controlling the access control device to communicate with the ESP32 module, receiving instructions from the cloud platform, judging the legitimacy of the unlocking request, and sending the unlocking instruction to the access control device. 8. The intelligent access control system according to claim 6, characterized in that: The mini program interacts with the cloud server for data exchange and supports users to remotely access and control the access control system. Users can access the real-time monitoring data, door opening records, and alarm information of the access control system through the mini program. Users can also remotely control the access control system's switches, password settings, and view suspicious person alarm functions through the mini program. 9. The intelligent access control system according to claim 8, characterized in that: The mini-program configures a user interface module, implements user interaction through a touch screen or a mobile application, and supports the mini-program to perform system settings or manually control access control. 10. The intelligent access control system according to claim 5, characterized in that: The server has an abnormal alarm function, which notifies the administrator via email or text message in the event of illegal intrusion or system failure, and updates data in real time through the mini program for rapid response.